By pressing the appropriate buttons on Cyclops's keyboard, a blind person can "read" any printed document in the English language.

通过按下 Cyclops 键盘上适当的按钮，盲人可以“阅读”任何英文打印文件。

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Blind people can hear content of the special web page with sound navigation by using keyboard to control the browser.

盲人借助语音导航功能，通过键盘的上下左右键就能浏览特定网站的网页内容。

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So it is inconvenient for users to play with these devices whether by keyboard or touch screen, especially for an aged or blind person.

这样的情况下，无论是使用键盘还是触摸屏，都难以提供足够良好的人机交互，尤其老年人、视力有障碍者对这些设备的操作难度更大。

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